Well, I wash everything! And, I don't buy pre-cut fabrics. I've seen too many fabrics that have been manhandled or used as hankerchiefs, unsupervised children with their chocolaty hands -- if I see these stains, I won't buy that particular piece of fabric. One of the stores I shopped in for fabric, the clerk there found a chicken bone stuffed into the fabric. I think that explains sufficiently why I prewash everything! Also, I have asthma, and I won't take the risk of being thrown into an asthma attack by the chemicals contained in the fabric. Asthma attacks can and do kill people -- I don't want to be one of those people.